'Lord's' in the Bible

Then the heads of families of Judah and Benjamin, with the priests and the Levites, got ready, even all those whose spirits were moved by God to go up and take in hand the building of the Lord's house in Jerusalem.

And they gave praise to the Lord, answering one another in their songs and saying, For he is good, for his mercy to Israel is eternal. And all the people gave a great cry of joy, when they gave praise to the Lord, because the base of the Lord's house was put in place.